正则表达式修改xpath表达式 [英] Regex to modify xpath expression

问题描述

我必须使用我正在使用DOMParser的Java代码来验证Xpath表达式。我面临的问题是，对于默认命名空间，我需要调整xpath，然后才能通过代码进行评估。对于例如如果我想使用以下xpath -

I have to verify Xpath expressions using Java code for which I am using the DOMParser. The problem that I am facing is that for default namespaces I need to tweak the xpath before it can be evaluated by the code. For e.g. if I want to use the following xpath -

// party [@ id ='party1：abc'] / abc：person [@id ='交易者'] /交易/ abc：personId [@ personIdScheme ='urn：xyz：person-id：PEOPLESOFT'] / text（）

我需要将此代码传递给代码 -

I need to pass this to code as -

//：party [@ id ='party1：abc'] / abc： person [@ id ='Trader'] /：trade / abc：personId [@ personIdScheme ='urn：xyz：person-id：PEOPLESOFT'] / text（）

所以基本上要求是在所有相关节点之前放置一个：。

So basically the requirement is to put a : before all relevant nodes where default namespace is applicable.

有人可以帮助一个可以有效地进行这种转换的正则表达式吗？

Can someone please help with a regex which can do this conversion efficiently?

推荐答案

String str = "//party[@id='party1:abc']/abc:person[@id='Trader']/trade/abc:personId[@personIdScheme='urn:xyz:person-id:PEOPLESOFT']/text()";
str = str.replaceAll("/(?=\\w.*?/)(?![^\\[/]*:)","/:");

正则表达式查找的是 / 不是最后一个，后跟一个单词字符。

它还忽略那些已经：之前的 [或 / 。

The regex looks for the / that are not the last one, and are followed by a word character.
And it also ignores those that already have a : before the [ or /.

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